aboutsummaryrefslogtreecommitdiff
path: root/arch/mips/sni/sniprom.c
blob: 11eddd43458df4c9e04d1161894f690510ca700e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
/*
 * Big Endian PROM code for SNI RM machines
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2005-2006 Florian Lohoff (flo@rfc822.org)
 * Copyright (C) 2005-2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
 */

#define DEBUG

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/console.h>

#include <asm/addrspace.h>
#include <asm/sni.h>
#include <asm/mipsprom.h>
#include <asm/mipsregs.h>
#include <asm/bootinfo.h>

/* special SNI prom calls */
/*
 * This does not exist in all proms - SINIX compares
 * the prom env variable "version" against "2.0008"
 * or greater. If lesser it tries to probe interesting
 * registers
 */
#define PROM_GET_MEMCONF	58

#define PROM_VEC		(u64 *)CKSEG1ADDR(0x1fc00000)
#define PROM_ENTRY(x)		(PROM_VEC + (x))


static int *(*__prom_putchar)(int)        = (int *(*)(int))PROM_ENTRY(PROM_PUTCHAR);

void prom_putchar(char c)
{
	__prom_putchar(c);
}

static char *(*__prom_getenv)(char *)     = (char *(*)(char *))PROM_ENTRY(PROM_GETENV);
static void (*__prom_get_memconf)(void *) = (void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF);

char *prom_getenv(char *s)
{
	return __prom_getenv(s);
}

void __init prom_free_prom_memory(void)
{
}

/*
 * /proc/cpuinfo system type
 *
 */
static const char *systype = "Unknown";
const char *get_system_type(void)
{
	return systype;
}

#define SNI_IDPROM_BASE                0xbff00000
#define SNI_IDPROM_MEMSIZE             (SNI_IDPROM_BASE+0x28)  /* Memsize in 16MB quantities */
#define SNI_IDPROM_BRDTYPE             (SNI_IDPROM_BASE+0x29)  /* Board Type */
#define SNI_IDPROM_CPUTYPE             (SNI_IDPROM_BASE+0x30)  /* CPU Type */

#define SNI_IDPROM_SIZE	0x1000

#ifdef DEBUG
static void __init sni_idprom_dump(void)
{
	int	i;

	pr_debug("SNI IDProm dump:\n");
	for (i = 0; i < 256; i++) {
		if (i%16 == 0)
			pr_debug("%04x ", i);

		printk("%02x ", *(unsigned char *) (SNI_IDPROM_BASE + i));

		if (i % 16 == 15)
			printk("\n");
	}
}
#endif

static void __init sni_mem_init(void )
{
	int i, memsize;
	struct membank {
	        u32		size;
	        u32		base;
	        u32		size2;
	        u32		pad1;
	        u32		pad2;
	} memconf[8];

	/* MemSIZE from prom in 16MByte chunks */
	memsize = *((unsigned char *) SNI_IDPROM_MEMSIZE) * 16;

	pr_debug("IDProm memsize: %lu MByte\n", memsize);

	/* get memory bank layout from prom */
	__prom_get_memconf(&memconf);

	pr_debug("prom_get_mem_conf memory configuration:\n");
	for (i = 0;i < 8 && memconf[i].size; i++) {
		if (sni_brd_type == SNI_BRD_PCI_TOWER ||
		    sni_brd_type == SNI_BRD_PCI_TOWER_CPLUS) {
			if (memconf[i].base >= 0x20000000 &&
			    memconf[i].base <  0x30000000) {
				memconf[i].base -= 0x20000000;
			}
	}
		pr_debug("Bank%d: %08x @ %08x\n", i,
			memconf[i].size, memconf[i].base);
		add_memory_region(memconf[i].base, memconf[i].size, BOOT_MEM_RAM);
	}
}

static void __init sni_console_setup(void)
{
	char *ctype;
	char *cdev;
	char *baud;
	int port;
	static char options[8];

	cdev = prom_getenv("console_dev");
	if (strncmp (cdev, "tty", 3) == 0) {
		ctype = prom_getenv("console");
		switch (*ctype) {
		default:
		case 'l':
	                port = 0;
	                baud = prom_getenv("lbaud");
	                break;
		case 'r':
	                port = 1;
	                baud = prom_getenv("rbaud");
	                break;
		}
		if (baud)
			strcpy(options, baud);
		if (strncmp (cdev, "tty552", 6) == 0)
			add_preferred_console("ttyS", port, baud ? options : NULL);
		else
			add_preferred_console("ttySC", port, baud ? options : NULL);
	}
}

void __init prom_init(void)
{
	int argc = fw_arg0;
	char **argv = (void *)fw_arg1;
	int i;
	int cputype;

	sni_brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE;
	cputype = *(unsigned char *)SNI_IDPROM_CPUTYPE;
	switch (sni_brd_type) {
	case SNI_BRD_TOWER_OASIC:
	        switch (cputype) {
		case SNI_CPU_M8030:
		        systype = "RM400-330";
		        break;
		case SNI_CPU_M8031:
		        systype = "RM400-430";
		        break;
		case SNI_CPU_M8037:
		        systype = "RM400-530";
		        break;
		case SNI_CPU_M8034:
		        systype = "RM400-730";
		        break;
		default:
			systype = "RM400-xxx";
			break;
		}
	        break;
	case SNI_BRD_MINITOWER:
	        switch (cputype) {
		case SNI_CPU_M8021:
		case SNI_CPU_M8043:
		        systype = "RM400-120";
		        break;
		case SNI_CPU_M8040:
		        systype = "RM400-220";
		        break;
		case SNI_CPU_M8053:
		        systype = "RM400-225";
		        break;
		case SNI_CPU_M8050:
		        systype = "RM400-420";
		        break;
		default:
			systype = "RM400-xxx";
			break;
		}
	        break;
	case SNI_BRD_PCI_TOWER:
	        systype = "RM400-Cxx";
	        break;
	case SNI_BRD_RM200:
	        systype = "RM200-xxx";
	        break;
	case SNI_BRD_PCI_MTOWER:
	        systype = "RM300-Cxx";
	        break;
	case SNI_BRD_PCI_DESKTOP:
	        switch (read_c0_prid() & 0xff00) {
		case PRID_IMP_R4600:
		case PRID_IMP_R4700:
		        systype = "RM200-C20";
		        break;
		case PRID_IMP_R5000:
		        systype = "RM200-C40";
		        break;
		default:
		        systype = "RM200-Cxx";
		        break;
		}
	        break;
	case SNI_BRD_PCI_TOWER_CPLUS:
	        systype = "RM400-Exx";
	        break;
	case SNI_BRD_PCI_MTOWER_CPLUS:
	        systype = "RM300-Exx";
	        break;
	}
	pr_debug("Found SNI brdtype %02x name %s\n", sni_brd_type,systype);

#ifdef DEBUG
	sni_idprom_dump();
#endif
	sni_mem_init();
	sni_console_setup();

	/* copy prom cmdline parameters to kernel cmdline */
	for (i = 1; i < argc; i++) {
		strcat(arcs_cmdline, argv[i]);
		if (i < (argc - 1))
			strcat(arcs_cmdline, " ");
	}
}